Sometime in either the late 1990s or early-2000s (don't recall) there was a company that came out with a vestibular stimulator explicity for VR applications. Th

Sometime in either the late 1990s or early-2000s (don't recall) there was a company that came out with a vestibular stimulator explicity for VR applications. They apparently sold units for game developers to use, along with a Windows API (hooked into Direct3D or DirectX - or something like that). It wasn't cheap - and ultimately they came into the market at the wrong time (dotcom crunch, and people didn't want VR stuff at the time anyway - the first VR winter was in full swing at that point).